But without a thermometer, how do you know if you are suffering from hypothermia? Officials say warning signs include uncontrollable shivering, memory loss, disorientation, incoherence, slurred speech, drowsiness and apparent exhaustion.

Frostbite is damage that extreme cold does to your skin and underlying body tissues. The National Weather Service says a wind chill of nearly minus 29 degrees Celsius will cause frostbite in just 30 minutes.

Frostbite often affects the extremities of the body - those areas farthest from the warmth of your core, such as fingers, toes, ear lobes and the tip of the nose. It can turn those body parts white and cause you to lose feeling in the areas.

Authorities say the best protection from the cold is to stay out of it.